Hoist.



G. W. BOLLMAN.

HOIST.

APPLICATION FILED JULY 13, 1903.

PATENTED APR. 17, 1906.

ATTORNEY No. 817,747. 'PATENTED APR .717, 1906;

. G. W. .BOLLMAN. HOIST.

APPLICATION 11.31) JuLms, 1903.

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Applicationfiled July 13 1903. Serial No. 165,301.

.To. allwhom may concern":

Be it known that I, GEoReE TN. BOLLMAN, a citizen of the United States,-residing in Fittsbur in the county of Allegheny and State of ennsylvania, have invented certain new and useful Improvements in Hoists, of which the follow-in is a specification.

My invention relates more particularly to hoists, and especially-to that class of hoists used in connection with. furnaces.

I will d'escrihe'a hoist embodying my invention and then point out the novel features thereof'in claims.

In the accompanying drawings, Figure 1 is a diagrammatical-view in'elevation of a hoist embodying my invention and certain other devices employed in connection with the hoist. Fig. 2 is a view in vertical longitudinal section of a and bucket com-- prised in my invention. Fig. 3 shows a modified form of apparatus also embodying my invention.

Similar lettersoi reference designate corresponding parts in all of the figures.

Referring to the drawings, A designates an incline, which may be ofany desired construction and material.

B designates a car adapted for travel up and down the incline on tracks which, as here shown, are so arranged at the upper end of the incline as to cause a tilting of the car in the manner shown in dotted lines to discharge its contents into the furnace G. The travel of the car up and down the incline is here shown as being effected through a cable C, one end of which is preferably connected to a bail c, secured to the car B. The cable C passes over a sheave or pulley a, suitably jo'urnaled at the upper part of the incline,

' of gravity acting and the other end oi'the cable is connected to a drum D, which is rotated by an engine or motor E. The drum may be rotated in one direction only by the motor and allowed to run freein tne opposite direction by reason on tue car. In the latter case a suitable brake should be employed to stop the rotation of-the drum. A stop a is shown at the lower end of the incline to limit the downward travel of the car. The lower end of the incline is also here shown as being in a different and steeper grade than the remainder of the incline, a purpose of which arrangement to have the car in such position Specification of Letters IPatent.

as to be conveniently filled from achute F. This is an arrangement in common use in hoists; but it is not necessary, and the lower end may be in the same grade as the remain: der of the incline. l

The engine or motor E may be of any desired type, and it is arbitrarily re the drawings. desired type, and any desired form of gearing may be employed between the engine or motor E and the drum.

In order that the engine started easily and quickly, under many circumstances, such as where the car and load are on a steep grade (as, for example, that shown in Fig. 1) or where the full power of the engine or motor employed for raising the car and load is not available at the starting of the engine or motor, to provide means for overcoming the inertia of the load and car with less initial pull than would otherwise be required. This may be accomplished by the means shown in the drawings, The car B, as here shown, comprises a suitable body b, mounted on wheels I), which travel on the rails on the incline, and a frame provided with rollers or other devices I), which. travel on suitable ways provided on the body I). A bucket or receptacle b is rigidly mounted on the frame b which the end of the cable C is secured, ishere shown as being pivotally connected with the bucket or receptacle. The movement of the frame 5 which carriesthe load, is limited" by stops 6 If, provided on the. body I).

or motor may be It willbe apparent from the foregoing that i when the engine or motor is started the only load upon it will be the weight of the bucket, frame, and the contents 0 that by reason of themovement of the load relatively to the body of the car the engine or motor is enabled to acquire momentum be- "fore it starts to raise the load and car together. The advantage of my invention in the case of two-cylinder engines will be readily seen. For starting th s type of engine only one cylinder, is available, and the only load upon it will be the bucket, frame, and contents of the bucket. Theinoverne nt of the load independently of the body permits broughtintoservice be: 1 5... tents, andbody b is to be raised onthe in,

of both pistons b eing I tore the full weight of the bucket, frame, conresented in v The drum may'a so be of any h I find it desirable The bail c, to-

Patented April-17, ieoej I the bucket and stood that I cline. It will be frame b 'has been of the body of the car, as shown in dotted"! linesythe continued action of the engine or motor will raise both to the to of the incline, where the contents of the bucl et may be 'dischar ed into-the furnace G. '4

While- I have described I connection with hoists for furnaces, it will be understood that it may be employed where ever is is desired to overcome the inertia of a load with less-initial pull than would otherwise be required. It will also be underdo not desire to be limited to the arrangement described and shown in the drawings,as various changes may be made in the several parts described without departing from the spirit of my invention. For example, Fig. '3, the cable 0 may be connected with the body 1) instead of to the bucket or receptacle b or its frame b In this case the body I) may be started in advance of the bucket or receptacle, and subsequently take up the same. In this modification the bucket may be prevented from remaining at the lower end of the car when the same is at its lowest position in any suitable way, such as by a stop or buffer X, suitabl-y arranged.

What I claim as my invention is 1. The combination with a car carrying a load, of a motor for moving said car and load and means for first overcoming the inertia of one or the other with less initial pull or strain than would otherwise be required and then placing the full pull or strain of the car and load on said motor as soon as the inertia of' the former has been overcome.

2. The combination with a car carrying a load, of a motor for moving said car and load, and'means for first overcoming the inertia of one or the other with less initial pull or strain than would otherwise be required while the motor is ac uiring momentum, then placing the full pul or strain of the car and load upon said motor as soon as said motor has acquired momentum.

3. The combination with a car carrying a load, of a motor for moving said car and load and means wholly carried by said car for overcoming the inertia of said car and load with less initial pull than would otherwise be re uired and subsequently placing the full pul and strain of said car and load on the motor.

4. The combination of an incline, a car adapted for travel up and down the incline and comprising a body and a receptacle cara cable and a motor for effecting the travel of the car on the incline, and means permitting of a relative movement between the body and the receptacle V whereby the inertia of said body,

and receptacle is overcome with less initial pull than would otherwise be required.

I 5. Thecombinationin'a hoislgof anincline, a car adapted for travel 'up'and-down the in cline, a cable and motor for effecting the travelof the car on the incline, said-car comprising a bodyand abucket capable of a movement independently of the body whereby the inertia of said body and bucket is my invention in overcome wi+h less initial ,pull than would otherwise be required.

6. The combination in a hoist of an incline, a car adapted for travel up and down the incline, a cable and motor for effecting the travel of the car on the incline, saidcar comprising a body, a frame movable on said body and carrying a-bucket whereby the inertia of said body and frame is overcome with less initial pull than would otherwise be required. V 7. The combination in a hoist, of an incline, a car adapted for travel up and downthe incline, a cable and motor for effecting the travel of the car on the incline, said car comprising a body, a frame movable on said body and carrying a bucket, whereby the inertia of said' body and frame is overcome with less initial pull than would otherwise be required, l and stops for limiting the movement frame on the body. I 8. The combination of an incline, the lower I end of which is in a steeper grade than the travel of the car I by the inertia of said load and ts support is the overcome with less initial pull than would otherwise be required when the car is on the steeper grade of the incline. I 9. The combination of an incline, a car l comprising a body I thereby adapted for travel up and down the incline, a cable and a motor for effecting the travel of the car on the incline, said cable being connected with the receptacle, and means permitting of a relative movement between the body and the receptacle whereby the inertia of said body and receptacle is overi come with less initial pull than would otherl wise be required.

10. The combination in a hoist, of anincline, a car adapted for travel up and down the incline, a cable and motor for efiecting the travel of the car on the incline, said car i comprising a body and frame movable on said body, and carrying a receptacle, to l which the cable is connected whereby the inertia of said body and receptacle is overcome with less initial pull than would otherwise be required, and stops for limiting the movement of the frame on the body.

. 11. The combination with a car carrying a load, of a motor adapted to move said car and load from a starting-point, and means i which are near the car and startingpoint of the and a receptacle carried v'rhenever said car and load is at the startingpomt, anuada oted. overcome the mertla to this specification in the presence of two of said car and: load with less initial ml 01 subscribing Witnesses.

GEORGE W. BOLLB'KAN.

strain than would oin wxise be mqxxired and thereafter phmefihsiuli 1 (i stram there of 011 the 1110602.

in Witness whereof I have signed my name Witnesses WV. H. BRADY, HENRY E. RIRBY. 

